.container {
    display: flex;
    justify-content: center;
    /* 水平居中 */
    align-items: center;
    /* 垂直居中 */
    height: 100vh;
    /* 使容器高度为视口高度 */
}

.centered-div {
    width: 1260px;
    height: 600px;
    display: flex;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.774);
    padding: 20px;
    position: relative;
}

.login-img {
    position: absolute;
    width: 100px;
}

.login-img img {
    width: 100%;
}

.login-svg {
    flex: 2;
    margin-left: 150px;
}

.login-svg img {
    width: 100%;
    height: 100%;
}

.login-form {
    flex: 3;
    margin-right: 150px;
    position: relative;
}

.login-form-div {
    padding: 20px;
    position: absolute;
    top: 50%;
    left: 60%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 350px;
    background-color: rgba(173, 173, 173, 0.219);
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(161, 161, 161, 0.774);
}

.login-form-div h3{
    width: 98%;
    margin: 0 auto 10px;
    text-align: center;
    letter-spacing: 2px;
    height: 50px;
    line-height: 50px;
    border-bottom: 1px solid #ccc;
}

.login-form-form{
    width: 70%;
    margin: 20px auto 0;
}

.btn-div{
    text-align: center;
    margin-top: 50px;
}

.btn-div button{
    width: 100%;
}